Madison Avenue Partners, LP 13F: Quarter-over-Quarter Portfolio Changes
Madison Avenue Partners, LP reported a disclosed portfolio value of approximately $2.3 billion in its latest SEC Form 13F-HR filing for Q2 2026, up 1.0% quarter on quarter. Over the quarter, the fund initiated 7 new positions, bought more shares in 7 holdings, trimmed 8 holdings, and exited 9 positions.
Madison Avenue Partners, LP's top buy was a new stake in Invitation Homes INC. (INVH) , equal to 10.8% of the disclosed portfolio. Its top sell was Sandisk CORP (SNDK) . The fund sold 98.4% of its previously reported shares, reducing the position's portfolio weight by 16.2 percentage points.
New PositionsQ2 2026
Securities disclosed for the first time in Q2 2026 that were not present in the prior 13F-HR filing.
| Company | Ticker | Initial Portfolio Weight | History |
|---|---|---|---|
| INVITATION HOMES INC. | INVH | 10.8% | History → |
| OCTAVE INTELLIGENCE PLC | OCTV | 3.0% | Holders → |
| SANMINA CORP | SANM | 2.1% | Holders → |
| PRIMORIS SVCS CORP | PRIM | 2.0% | Holders → |
| ARRAY DIGITAL INFRASTRUCTURE | AD | 1.7% | Holders → |
| MILLROSE PPTYS INC | MRP | 0.4% | Holders → |
| MONRO INC | MNRO | 0.1% | Holders → |
Top BuysQ2 2026
The fund's top buys among existing positions in Q2 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| STAAR SURGICAL CO | STAA | +3.2% | +71.0% | History → |
| LAKEFRONT BIOTHERAPEUTICS NV | GLPG | +1.2% | +39.9% | History → |
| COUPANG INC | CPNG | +1.6% | +33.0% | History → |
| GLOBUS MED INC | GMED | +0.5% | +30.3% | Holders → |
| MARKEL GROUP INC | MKL | +2.1% | +27.8% | History → |
| GRAHAM HLDGS CO | GHC | +0.8% | +0.2% | History → |
| TURNING PT BRANDS INC | TPB | +-0.0% | +0.0% | Holders → |
Top SellsQ2 2026
The fund's top sells among positions it retained in Q2 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| SANDISK CORP | SNDK | -16.2% | 98.4% | Holders → |
| INDIVIOR PLC | INDV | -0.6% | 33.4% | History → |
| MAGNERA CORP | MAGN | 0.0% | 18.1% | Holders → |
| SOLVENTUM CORP | SOLV | 0.5% | 7.2% | History → |
| BRITISH AMERN TOB PLC | BTI | -0.1% | 7.2% | Holders → |
| SINCLAIR INC | SBGI | 0.0% | 6.1% | Holders → |
| MAGNUM ICE CREAM CO NV | MICC | 0.7% | 4.8% | History → |
| THERAVANCE BIOPHARMA INC | TBPH | 0.0% | 3.1% | History → |
Full ExitsQ2 2026
Positions present in the prior 13F-HR filing that no longer appear in Q2 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| ICON PUB LTD CO | ICLR | 6.2% |
| MOLINA HEALTHCARE INC | MOH | 3.7% |
| WILEY JOHN & SONS INC | WLY | 1.1% |
| PRIMO BRANDS CORPORATION | PRMB | 1.1% |
| DNOW INC | DNOW | 0.7% |
| CENTRAL BANCOMPANY | CBC | 0.5% |
| PAR TECHNOLOGY CORP | PAR | 0.3% |
| FRANKLIN STR PPTYS CORP | FSP | 0.0% |
| SHARKNINJA INC | SN | 0.0% |
Net Portfolio Value ChangeQ2 2026
- $2.3BPrior quarter
- $2.3BCurrent quarter
- +$0.0BNet delta
- +1.0%% change
Methodology & FAQ
How Madison Avenue Partners, LP Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for Madison Avenue Partners, LP: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description, including how confidential treatment filings are handled, is documented in the Methodology.
What stocks did Madison Avenue Partners, LP buy in Q2 2026?
In Q2 2026, Madison Avenue Partners, LP initiated 7 new positions (INVITATION HOMES INC. (INVH), OCTAVE INTELLIGENCE PLC (OCTV), SANMINA CORP (SANM), PRIMORIS SVCS CORP (PRIM), ARRAY DIGITAL INFRASTRUCTURE (AD), MILLROSE PPTYS INC (MRP), MONRO INC (MNRO)); bought more shares of STAAR SURGICAL CO (STAA), LAKEFRONT BIOTHERAPEUTICS NV (GLPG), COUPANG INC (CPNG), GLOBUS MED INC (GMED), MARKEL GROUP INC (MKL) (the largest 5 of 7 adds).
What stocks did Madison Avenue Partners, LP sell in Q2 2026?
In Q2 2026, Madison Avenue Partners, LP fully sold 9 positions (ICON PUB LTD CO (ICLR), MOLINA HEALTHCARE INC (MOH), WILEY JOHN & SONS INC (WLY), PRIMO BRANDS CORPORATION (PRMB), DNOW INC (DNOW), CENTRAL BANCOMPANY (CBC), PAR TECHNOLOGY CORP (PAR), FRANKLIN STR PPTYS CORP (FSP), SHARKNINJA INC (SN)); reduced holdings in SANDISK CORP (SNDK), INDIVIOR PLC (INDV), MAGNERA CORP (MAGN), SOLVENTUM CORP (SOLV), BRITISH AMERN TOB PLC (BTI) (the largest 5 of 8 reductions).
Which positions did Madison Avenue Partners, LP initiate in Q2 2026?
Madison Avenue Partners, LP established 7 new positions in Q2 2026: INVITATION HOMES INC. (INVH, 10.8%), OCTAVE INTELLIGENCE PLC (OCTV, 3.0%), SANMINA CORP (SANM, 2.1%), PRIMORIS SVCS CORP (PRIM, 2.0%), ARRAY DIGITAL INFRASTRUCTURE (AD, 1.7%), MILLROSE PPTYS INC (MRP, 0.4%), MONRO INC (MNRO, 0.1%).
Which existing positions saw the largest allocation increases for Madison Avenue Partners, LP in Q2 2026?
Of 7 existing positions with share-count increases in Q2 2026, the largest were: STAAR SURGICAL CO (STAA, +3.2% weight, +71.0% shares), LAKEFRONT BIOTHERAPEUTICS NV (GLPG, +1.2% weight, +39.9% shares), COUPANG INC (CPNG, +1.6% weight, +33.0% shares), GLOBUS MED INC (GMED, +0.5% weight, +30.3% shares), MARKEL GROUP INC (MKL, +2.1% weight, +27.8% shares), GRAHAM HLDGS CO (GHC, +0.8% weight, +0.2% shares), TURNING PT BRANDS INC (TPB, +-0.0% weight, +0.0% shares).
Which positions did Madison Avenue Partners, LP fully exit in Q2 2026?
Madison Avenue Partners, LP fully exited 9 positions in Q2 2026: ICON PUB LTD CO (ICLR, last-reported weight 6.2%), MOLINA HEALTHCARE INC (MOH, last-reported weight 3.7%), WILEY JOHN & SONS INC (WLY, last-reported weight 1.1%), PRIMO BRANDS CORPORATION (PRMB, last-reported weight 1.1%), DNOW INC (DNOW, last-reported weight 0.7%), CENTRAL BANCOMPANY (CBC, last-reported weight 0.5%), PAR TECHNOLOGY CORP (PAR, last-reported weight 0.3%), FRANKLIN STR PPTYS CORP (FSP, last-reported weight 0.0%), SHARKNINJA INC (SN, last-reported weight 0.0%).
Which existing positions saw the largest allocation reductions for Madison Avenue Partners, LP in Q2 2026?
Of 8 existing positions with share-count reductions in Q2 2026, the largest were: SANDISK CORP (SNDK, -16.2% weight, -98.4% shares), INDIVIOR PLC (INDV, -0.6% weight, -33.4% shares), MAGNERA CORP (MAGN, 0.0% weight, -18.1% shares), SOLVENTUM CORP (SOLV, 0.5% weight, -7.2% shares), BRITISH AMERN TOB PLC (BTI, -0.1% weight, -7.2% shares), SINCLAIR INC (SBGI, 0.0% weight, -6.1% shares), MAGNUM ICE CREAM CO NV (MICC, 0.7% weight, -4.8% shares), THERAVANCE BIOPHARMA INC (TBPH, 0.0% weight, -3.1% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.